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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Stumped (stalls out)

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Old May 28, 2003 | 06:42 PM
  #1  
djhuebner's Avatar
djhuebner
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From: Austin US
Stumped (stalls out)

This one has me puzzled. Just replaced the AC compressor on a 1994 F150 5.0 L 4x4. AC works fine but the engine now stalls out after acceleration or throttle activation when the AC is on. Idle is about 500 rpm. A scan revealed no codes and indicated system passed. It is very difficult to restart the engine when AC switch is on but turn off the AC and the motor immediately restarts???

Can't find any disconnections of vacuum lines or controls and high speed highway performance is fine. It will die sometimes when slowing down at a traffic stop or during low speed turn.

Any suggestions? Thanks,

Don
 
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Old May 28, 2003 | 08:12 PM
  #2  
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steve83
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From: Memphis, TN
Stumped (stalls out)

Check the IAC by the Haynes manual procedure using a multimeter, and have the A/C pressure tested. The compressor may be on the verge of seizing up.
 
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Old May 31, 2003 | 05:19 PM
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djhuebner
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Stumped (stalls out)

steve83,

Thanks...it was the IAC.

Don
 
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